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PERCONA MONITORING AND MANAGEMENT DOCUMENTATION

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Percona Monitoring and Management 3.9.0

Release date: July 2026

Percona Monitoring and Management (PMM) is an open source database monitoring, management, and observability solution for MySQL, PostgreSQL, MongoDB, Valkey and Redis. PMM empowers you to:

  • monitor the health and performance of your database systems
  • identify patterns and trends in database behavior
  • diagnose and resolve issues faster with actionable insights
  • manage databases across on-premises, cloud, and hybrid environments

📋 Release summary

Note

Release summary to be added.

✨ Release highlights

Data size monitoring for MongoDB replica sets and sharded clusters

You can now monitor data growth across your MongoDB deployments and plan capacity from the MongoDB ReplSet Summary and MongoDB Sharded Cluster Summary dashboards. Each dashboard includes two new panels for tracking data size:

  • Total data size: shows how much space your data and indexes currently occupy, so you know exactly where your deployment stands at any point in time.
  • Data size over time: plots the same total over the selected time range, so you can spot growth trends and make informed capacity decisions.

These panels require the dbstats collector on the MongoDB exporter. To enable it, pass --enable-all-collectors when adding your MongoDB service with pmm-admin add mongodb, or update an existing service with pmm-admin inventory change agent.

Disable individual metric collectors per service

PMM 3.9.0 adds a Disable collectors field to the Add service form for MySQL, PostgreSQL, MongoDB, and ProxySQL. You can now exclude specific metric collectors from collection without removing the service or modifying the exporter configuration.

This is useful when certain collectors generate metrics you don’t need, add overhead on resource-constrained hosts, or cause issues with specific database configurations.

Disable collectors field in Additional options

To use it, go to PMM Configuration > Add Service, expand Additional options, and enter a comma-separated list of collector names in the Disable collectors field.

For the full list of available collectors per database type, see Connect MySQL databases to PMM and Connect PostgreSQL databases to PMM.

📈 Improvements

(PMM-13306): Added data size panels to the MongoDB ReplSet Summary and MongoDB Sharded Cluster Summary dashboards to help you monitor data growth and plan capacity.

✅ Fixed issues

Note

Fixed issues to be added.